Deserialization of internal json objects

[vinny74man]

Hi all how can I deserialize this string?

"{"topic": "homeassistant/cmd/1", "payload": "{"state": "ON", "color": {"r": 255, "g": 255, "b": 255}}"}"

Thanks

[bblanchon]

Hi @vinny74man,

Did you try the ArduinoJson Assistant?

Best regards,
Benoit

[vinny74man]

Yes but it did not help me, my problem is not the deserialization of the string, but to access the values of "R, G, B", inside the key payload, the only way I found is to create two jsonDocument , but I wanted to know if there was a way to avoid it.

Thanks

Sorry this is an online translation

[bblanchon]

Hi @vinny74man,

It should be as simple as doc["payload"]["color"]["r"].

However, I wonder if your input is valid.
See, this is not a valid JSON document:

{"topic": "homeassistant/cmd/1", "payload": "{"state": "ON", "color": {"r": 255, "g": 255, "b": 255}}"}

Please make sure that the input is valid.
If the problem persists, please ask the ArduinoJson Troubleshooter and send me the report.

See also:

• deserializeJson() succeeds but I cannot read any value.

Best regards,
Benoit

[vinny74man]

The correct json is this,
{"topic": "homeassistant/cmd/1", "payload": "{\"state\": \"ON\", \"color\": {\"r\": 255, \"g\": 255, \"b\": 255}}"}
in copying it the slashes have been deleted
this is valid

Sorry this is an online translation

[bblanchon]

Your JSON document suffers from the "JSON in JSON" syndrome, so as you found out, you must use two JsonDocuments and call deserializeJson() twice.